Centrifugal grain-cleaner.



E. MULLER. GENTEIFUGAL GRAIN oLmNBn.

APPLIOATION FILED FEB. 1, 190B.

Patented Mar. 30, 1909.

OFIflICE.

FRITZ MLLER OF ESSLINGEN, .G ERMA N Y.

CENTRIFUGAL GRAIN-CLEANER- Specification of Lettera Patent.

Patented March 30, 1909.

Application filed February 1, 1908. Serial NoV 413,536V

To all whom it 'may concern.'

Be it known that I, FRITZ M i'iLLEn, a citizen of the German Empire, residin r at Esslingen, in the Kingdom of W rtenllerg,

Elnplre of Germany; lave invented certain i new and usei'ul Improvements 1n Centrifugalv Grain-Cleaners; and I do hereby declare the following to be a fullZ clear, and exact description of the inventlon, such as will enable others skilled in the art to which it appel'- tains to make and use the same.

My invention relates to those centrifugal grain scourers or cleaners in which is placed a series of scouring pans disposed one above the other so that gram deposited in the upper pan will be thrown out at the periphery thereof and be delivered by gravity into a chute which directs its downward course back upon the inner portion of the next succeeding pan below, and so on to the bottom of the series. The grain in its descent meets an upward current of cleansing air which draws out the dust and large portions of extraneous matter, discharging 1t at the top of the machine. Insuch machines it has been ro osed to deliver an upward current of res air to each pan independently through a central air Hue having separate discharge openings leading into each an, whereby the vitiate air asses into an( out of each pan and thence rom the machine without again passing through the grain.

y purpose is to provide a machine for accom hshing theA results above' stated by.

mec anism which will be much chea er, stronger and better in numerous ways t an that hitherto devised.

To this end my invention consistsin the peculiarities more fully described hereinafter and pointed out in the claims.

The accompan ing drawings represent a vertical section t rough my complete apparatus wherein the letter @represents a series of overlapping concentric cylinders nested one within the other, and servingr as deflectors for the upward current of air. The smallest cylinder is at the top and the largest at the bottom, with intervening circular discharge air spaces d between them. The Whole set of assembled cylinders have the general outline of a cone, and they surround a hollow revoluble air-shaft g closed at the top and open at the bottom` This shaft is fixed to revolve with two short solid shafts la, set in suitable bear' `ge in cross-beams of l a frame i, and driven by a horizontal pulley j. To this hollow rcvulublc shaft g is Secured a vel'lh-al serif-s ol' holitmtel pans b which rece-irc the descending;v grain from funnels r, havingr overlapping annular shields W attached to the inside of the cylinders a. The shields protect the inside oi the cylinders from the cutting cl'cct ci the particles of foreign matter liberated from the descending iii-ain. The hollow aicshaft g is supporte )y and secured to the lower section of the solid shaft i'i by a bridge-tree C perforated longitudinailjY to admit air ,indicated by the arrows. 'lhc ingroinpF fresh air is drawn upwardly through the hollow shaft g by a suction fan 'm on'solid shaft lay and is subdivided and delivered in separate streams to the pans through independent receiving orifices n. These orifices are graduz'tted in size according to the size of the pan suppliedy the larger ones being at the bottom and the smaller ones at the top of said hollow shaft g, thereby allow 'ing aV proportionate amount of air to enter each pan. The air passes over and through the grain in each pan and thence up and out through the vertical annular air space d intervening between the cylinders o, and thence on through the top ofthe surrounding chamber L and discharge flue E.

e is a feed chute which receives and delivers the grain to the top pan, and o is a re ceptacle at the bottom of the series to receive the scoured grain which passes out at th bottom through a discharge chute p.

While .l have mentioned my device as peculiarly fitted for scouring grain, it is evident that it might be used with e ual success in cleaning various other materia s.

Briey described the operation of my apparatus is as follows: The grain is fed into the upper pan b through the feed chute e at a point close to the side of the hollow sha'ft g andas this shaft is revolving at a considerable speed it throwathe grain outward bv centrifugal force against the shields W. The downwardly pointing arrows indicate the tortue us course of the grain which after leaving the first pan descends by gravity obliquely inward over the surface of the funnel 1c to the pan below, From the second pan the grain passes on down to the third pan, and so on throughout the series. As the grain dro s ofi the outer edge of each pan, it is niet y the uprushing current of air drawn up through the hollow shaft by the suction fun 1C, und thel lightm cxtruncuun mutter which is lnnsuncd by tlm action nl centrifugal fnrcu is hlmwn upwardly smul mt through the 00111111011 w 11ste ihm ahum.

Having thus described my invention, wlmi l claim as new :md (llisiru tu Secura hy lmltww: Patent is:

l. A centrifugal grain Schulvipl'mnlml with a Centrali 21nd vurtiratl revulnlile hollow' Shaft carrying :t surivs 0f rotary pains unil having air inlets lmulintr wntrzilly to mil-h l Cnrrunt if air upwardly through the` ulmningn in said devious.

'.24 Aln u mntrifuggnl gmin Schumi', u hollow nir alml't larmil'lcrd with graduated un' inlctxv amd fore-,ud draft eiwit-vs, in umnhinatiun with :t scrivi; of grmlmtlml puns cnrrml by Lwifi :shaft7 und mnwntrir grmlnulwl u ylnulmrs .surrnnntling' tlw` puns und spacci] apart,

nnrbltell und arraingrml snlmtnntiztlly in the fnl'in of n bonu. ln tL-stnnunjy hou-nl' Vl nllllx my signatur@ n1 present@ nl two wilncssvs.

FRITZ lrllililill.

Witnmsu:

JEAN (,lfilnfcx, HERMANN liurrn. 

